In the second passage to which I referred above, Prof. Sidgwick returns from the discussion of Virtue and Pleasure, with which he has meanwhile been engaged, to consider what among the parts of Human Existence to which, as we saw, he has limited the ultimate end, can really be considered as such end. What I have just said, of course, appears to me to destroy the force of this part of his argument too. If, as I think, other things than any part of Human Existence can be ends-in-themselves, then Prof. Sidgwick cannot claim to have discovered the Summum Bonum, when he has merely determined what parts of Human Existence are in themselves desirable. But this error may be admitted to be utterly insignificant in comparison with that which we are now about to discuss. (§ 51 ¶ 1)

It may be said, says Prof. Sidgwick (III. XIV. §§ 4—5), that we may … regard cognition of Truth, contemplation of Beauty, Free or Virtuous action, as in some measure preferable alternatives to Pleasure or Happiness—even though we admit that Happiness must be included as a part of Ultimate Good…. I think, however, that this view ought not to commend itself to the sober judgment of reflective persons. In order to show this, I must ask the reader to use the same twofold procedure that I before requested him to employ in considering the absolute and independent validity of common moral precepts. I appeal firstly to his intuitive judgment after due consideration of the question when fairly placed before it: and secondly to a comprehensive comparison of the ordinary judgments of mankind. As regards the first argument, to me at least it seems clear after reflection that these objective relations of the conscious subject, when distinguished from the consciousness accompanying and resulting from them, are not ultimately and intrinsically desirable; any more than material or other objects are, when considered apart from any relation to conscious existence. Admitting that we have actual experience of such preferences as have just been described, of which the ultimate object is something that is not merely consciousness: it still seems to me that when (to use Butler’s phrase) we sit down in a cool hour, we can only justify to ourselves the importance that we attach to any of these objects by considering its conduciveness, in one way or another, to the happiness of sentient beings.(§ 51 ¶ 2)

The second argument, that refers to the common sense of mankind, obviously cannot be made completely cogent; since, as above stated, several cultivated persons do habitually judge that knowledge, art, etc.,—not to speak of Virtue—are ends independently of the pleasure derived from them. But we may urge not only that all these elements of ideal good are productive of pleasure in various ways; but also that they seem to obtain the commendation of Common Sense, roughly speaking, in proportion to the degree of this productiveness. This seems obviously true of Beauty; and will hardly be denied in respect of any kind of social ideal: it is paradoxical to maintain that any degree of Freedom, or any form of social order, would still be commonly regarded as desirable even if we were certain that it had no tendency to promote the general happiness. The case of Knowledge is rather more complex; but certainly Common Sense is most impressed with the value of knowledge, when its fruitfulness has been demonstrated. It is, however, aware that experience has frequently shown bow knowledge, long fruitless, may become unexpectedly fruitful, and how light may be shed on one part of the field of knowledge from another apparently remote: and even if any particular branch of scientific pursuit could be shown to be devoid of even this indirect utility, it would still deserve some respect on utilitarian grounds; both as furnishing to the inquirer the refined and innocent pleasures of curiosity, and because the intellectual disposition which it exhibits and sustains is likely on the whole to produce fruitful knowledge. Still in cases approximating to this last, Common Sense is somewhat disposed to complain of the misdirection of valuable effort; so that the meed of honour commonly paid to Science seems to be graduated, though perhaps unconsciously, by a tolerably exact utilitarian scale. Certainly the moment the legitimacy of any branch of scientific inquiry is seriously disputed, as in the recent case of vivisection, the controversy on both sides is generally conducted on an avowedly utilitarian basis. (§ 51 ¶ 3)

The case of Virtue requires special consideration: since the encouragement in each other of virtuous impulses and dispositions is a main aim of men’s ordinary moral discourse; so that even to raise the question whether this encouragement can go too far has a paradoxical air. Still, our experience includes rare and exceptional cases in which the concentration of effort on the cultivation of virtue has seemed to have effects adverse to general happiness, through being intensified to the point of moral fanaticism, and so involving a neglect of other conditions of happiness. If, then, we admit as actual or possible such infelicific effects of the cultivation of Virtue, I think we shall also generally admit that, in the case supposed, conduciveness to general happiness should be the criterion for deciding how far the cultivation of Virtue should be carried. (§ 51 ¶ 4)

There we have Prof. Sidgwick’s argument completed. We ought not, he thinks, to aim at knowing the Truth, or at contemplating Beauty, except in so far as such knowledge or such contemplation contributes to increase the pleasure or to diminish the pain of sentient beings. Pleasure alone is good for its own sake: knowledge of the Truth is good only as a means to pleasure. (§ 51 ¶ 5)